The preparation of the multiwalled carbon nanotube (MWCNT)/poly(L-lactide) composite and their corresponding spectroscopic (Raman), the microscopic characterization, electron transport, thermal properties and biocompatibility are reported. The study of PLLA/MWCNT composite has shown that the MWCNTs in the composite have the effect of inducing crystallization and plasticizing the polymer matrix and its presence in the composite inhibits the growth of the fibroblast cells.

Evidence for, and an understanding of, the initial nucleation of carbon nanotubes produced by a floating catalyst method

Article Abstract:

Evidence is provided for the understanding the initial nucleation of single walled carbon nanotubes (SWNTs) and double-walled carbon nanotubes (DWNTs) based on the experimental results and high-resolution transmission electron microscopy (HRTEM) observations. A growth model is proposed for the formation of the SWNTs and DWNTs, which might provide the possibility of controlling the structure of carbon nanotubes (CNTs).

Aligned double-walled carbon nanotube (DWNT) long ropes with a narrow diameter distribution were synthesized by sulfur-assisted floating catalytic decomposition of methane. The electronic properties of the two constituent tubes of the DWNTs were identified based on the resonant Raman measurements, and results indicate that the product consists of some semiconducting-metallic DWNTs.